USRE8429E - Improvement in lightning-rods - Google Patents

Description

I but our invention is not limited to this par- LELAND D. VEBMILYA,

UNITED STATES PATENT OFFICE.

0F DAYTON, OHIO, AND WILLIAM s. .REYBUBN AND EDMOND A. W. HUNTER, OF PHILADELPHIA; SAIDIVEBMILYA ASSIGNOR,

BY MESNE ASSIGNMENTS, TO SAID REYBURN AND HUNTER AND BYRON P. MOULTON, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT I N LIGHTNING-RODS.

Specification forming part of Letters Patent No. 92,551, dated July 13, 1869; Reissue No. 8,429, dated September 24, 1878; application filed August 3, 1878.

To all whom it may concem:

Be it known that LELAND D. VERMILYA of Dayton, in the county of Montgomery and State of Ohio, andWILLLu! S. BEYBUBN and Emrorm A. W. HU TER, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Lightning-Rods, which is fully described in the following specification, reference being bad to the accompanying drawings, in whichv igurel represents a side view of a section of rod constructed according to our invention, and Fig. 2 an end view, showing the shape of the rod in cross-section.

Our invention relates tothe construction of lightning-rods upon the exterior of which are ribs or flanges.

The invention consists ina rod composed of a core of iron, of suitable form, and a strip or sheet of copper applied to the core so as to form an outer covering or casin g, which -flts closely the opposite edges or ribs of the core. It also consists in the combination of a core of iron and acovering of sheet-copper the surface of which is flanged or angular.

It also consists in the special manner of combining the core and copper casing, all of which will be hereinafter morefnlly set forth.

In the drawings, A represents a section of lightning-rod, which is composed of a core, a, of angle-iron, and an outer coveringor casing, b, of sheet-copper, which is wrapped around the core so as to completely cover it and expose upon the surface only the sheet-copper.

The iron core is, in the example, in the form of a cross-section, there being four wings or angles of sufficient weight to give the required strength to the 'rod when the latter is twisted or given a spiral form, as shown in the drawing. This is undoubtedly the best form that a given weight of iron vcan be put into for a lightning-rod, as its self-supporting power and condnctibility cannot be excelled;

ticular form, as the wings may be more or less in number, as may be desired.

' To. increase the conductive power of the b, of-sheet-copper. This sheathing is applied when the rod is twisted, the sheet of copper being put on and the rod twisted at one and the same operation, though the precise manner of applying the covering does not constitute any portion of the invention herein claimed.

The edges of the copper ribbon are lapped make a water-tight joint, which will eflectually exclude water and prevent oxidation. The copper sheet is firmly pressed to the surface and into the angles of the iron, and the rod in this spiral form is equal in its conductive power to a round copper rod of the same diameter, while the stiffness and strength of the iron are secured by the combination of two metals in this form. This combined spiral rod (which is equal, as to its conductive power, to a solid copper rod presenting the same superflcial area, and superior as regards its strength and self-supporting power) can be manufactured for one-third the cost of the solid'copper rod above named. We are thus enabled to furnish to the public a lightning-rod quite equal not superior to any rod in 'use,.at a greatly-reduced expense.

Having thus described our invention, what we claim as new, and desire to secure byLetters Patent, is--.

1. Alightning-rod composed, of an iron core having tapering edges or flanges and a' sheathing of sheet-copper, and is fitted to the edges or flanges thereof,

substantially as described.

2. In a lightning-rod, the combination of an iron core and a covering or casing of sheet copper bent to form a series of exterior ribs or flanges, substantially as described.

3. In a lightning ing h, closely fitted to the surface of the core,

and closed at its conti joint, substantially as escribed.

WILLIAM S. REYBURN. EDMOND A. W. HUNTER. BYRON P. MOULTON.

Witnesses:

, J No. TAYLOR,

rod we cover the iron core with a sheathing,

" ALFRED H. BRIDGE.

over each other and pressed down, sodas to which surrounds the core the core a of angleiron in combination with the copper sheath-' ens edges by a tight

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